My PON often gets "cling on's" and as much as I love her, this is not very appealing. Advice ?

You need to find a lower fat diet for your PON. Please read kibble labels or consider home cooking or a raw diet. 

My PON isn't accepting our new PON puppy and I need help. What can I do ?

 You didn't mention the age and general health of your PON. You may need to consult an animal behaviorist for professional advice.

 Aren't sheepdogs fond of rain ? My two hate rain and want to stay inside.

So far, I have found that most sheepdogs do NOT appreciate rain.

Do PONS like cats ?

This is very individual and depends on your household,etc.